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#include <fstream>
using namespace std;
int n,i,j,a[100000],b[100000],s[100000],m;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int main()
{
fin>>n;
for(i=0;i<n;i++)
fin>>a[i];
m=n-1;
for(i=n-1;i>=0;i--)
{
b[i]=0;
s[i]=-1;
for(j=i+1;j<n;j++)
if((b[j]>b[i])&&(a[i]<a[j]))
b[i]=b[j],s[i]=j;
b[i]++;
if(b[i]>b[m])
m=i;
}
fout<<b[m]<<"\n";
while(m!=-1)
{
fout<<a[m]<<" ";
m=s[m];
}
fout<<"\n";
return 0;
}